Band-forming pliers.



Puf'. DOUBS.

BAND FORMING PLIERS.

--APPLIOATION FILED 00T. 17, 1911.

1,034,59 1, Patented Aug. 6, 1912.

IlIlIIIIIIII QM ,kl @gu-WM 4' 'fil @www raam: r. nouns, or CANTON, omo.

l BAND-romaine rLrERs.

To all whom it may concern:

Be it, known tha-tl, FRANK F; D'UDS, a citizenr'of the United States, residing at Canton, inthe county of Stark and'Stateof Ohio, have invented new and useful Batid- Forming Pliers, f whiehthe l.tollviring' a'.

l specification.

This invention relates to improveinents in 'band forniing pliers, for use in the raetic'e ,culiarly adapted forthe forming of4 bands of dentist-ry, and especially Vto a p if'peon" teeth in the'mouth' vof al patient for 'the 'ment/with a application of bridges 'and the' like." 'Y

The objects of the invention areto gener# ally iinprovedevices-of the character mentioned'andto pr'ovide a plier of such formv and-shape that the operator nay beenabled to bring the plier into operative 'engage-f banden the tooth; ofa `patient`,". and may readily draw 'and' formfsaidband by the use of eieetua'l manner, and 4thus to accomplish said plier-inv a positive and better results in bridge workaand the like for which saidbandsare-formedj I fthe handles being broken Fig. 4 is a similar view, the jaws of the ,In the drawings- Figurel 1s a perspective view of a plierf'embodying myinvention. Fig. 2 isa side elevation ofthe plier,

front endy elevation ofthe head of the plier.

lier b eing open. Fig. 5- is'anelevation o the interior side of onof the jaws, showing a part of the-head in section. Fig. `6 is a perl spective view of one of the bandsbefore its application to the tooth. Fig. 7 is a per-v spectivc View of the bandl arranged on the tooth and before being forI ed. Fig. 8 is a perspective view and a plier in proper operative position to orin the same. Fig.`9 is a similar view, showing the position of the jaws of the plier and lthe .band lat the end 4of the forming operation.l Fig. 10, is a perspective-view ofthe tooth with the formed band thereon.

band removed from the tooth.

Fig. 11 is a'pe'rspeetive View of the formed Throughout the several Iviews similar ret erence numeralsindicate sinnlar parts.

Referring now to the construction of my improved plier as shown 1n the drawings, 1t

will be noted that the same comprises two the one constituting the principal members, handle 1', portion Q ot the head and jaw y3) and the other constituting the handle 4, portion-5 of the head and jaw 6. The portions Specification of Letters Patent. Appnation nied'ectoberir, 1911. serial No. estese@ away. Fig. v3 is aof the b nd on the tooth I Paesane; e 11m-2?@ Q and 5V are pivotally joined by the in 7,1- and int' so tions of the device 'arelconcerned no par 'tiular invention is herein claimed;v

The invention principali PSC lA;

duciiig the sidewise-curved stem'portion 9, which not only curves to the vertical pofsiv tion withreference to the general plane of the instrument, but passes beyond the vertical position,

tion 11; Said band engaging portion 1].y is

in ucli broader' in the said vertical p lanethan and forwardly producing the forward' tip 12 and rearwardly and inwardly, producing the rear tip 13. Frein the tip 12. to the tip 13 theouter edge 14 :of the band engaging portion is elliptic in side elevationas clearly shown in Fig. '5, the major vaxis ofthe e1 'lip'se passing through the tips 12 and' 13, and inthe preferable form of the device cut tingthe general plane ofthe instrument at an angle of, say, degrees.

'Considering thea'arious portions of the jaw in crss-section itwill be noted that the inner sides of the base steni 49 and band'engaging portion l() are preferably fiat. 'I be inner tace of the portion 11 lying in the median plane vertical'lto the general plane of the instrument when thejaws are in the closed position as shown in Fig.' 3, while the inner sides ofthe remaining portion of the jaw is curved outwardly away from said plane as shown at l5in thus permitting the hand engaging por-' tions ll to be brought closely and firmly together. The outer sides of the trunk'S and stern 9 may be rounded/in cross-section, the jaw tapering gradually from the trunk 8 to the point l0 as liereinbetore mentioned. The band engaging portion l1, however, is

resides' in the I description'offensiefgaia! teminste be given, it 'being un erstootjtliat; thegtfjgvaf i far as the handles and hea "p'orllportion 8 the jaw is preterab ly' ta-'ff` thegneral plane of the instrument,pro

returning slightlyl backwardfly Aand terminating at the point 10, at which. point' arises `the integral band engaging por--r ,SQ the stemportion -9 andexte'nds outwardly from thirty to forty-tive Fig. 3,

Y the remaining portions of the preferably flattened' externally at 16 to produce the comparatively thin elliptic edge 14, as clearly shown l'1n Fig. 3.

The inner or .band engaging face of the portion 1l is preferably serrated as shown in :he drawings, so as to securely grip the metallic bands, as hereinafter explained.

As shown the jaws not only curve to the side of the general but that said jaws also curve slightly backwardly or are returned so as to working edge 14 of tion 11 into a somewhat backwardly disposed position'so that the jaws of the plier may be entered into the mouth of the patient and the said working edges brought into operative position on the lingual side of the tooth, while the handle portion of the instrument is in convenient position for the operator.

In Fig. 3 is shown the position of the jaws when fully closed, and it will be seen that the oppositely disposed inner faces ot' the portions 11 are brought firmly together, jaws being separated from each other by reason of the curved inner surfaces at 15. Willen the jaws are opened, as shown in Fig. 4, the curvature of the inner faces of the jaws just 1nentioned is perhaps even more noticeable and this feature of construction is advantageous in permitting the operator to see the work between the jaws.

The. return-curved formation of the jaws permits the-operator to bring said jaws into suliciently firm engagement with the band so that the band forming port-ions 11 will properly engage the same and at the completion of the operation the fold in the band normally presents the appearance shown at 17 in the drawings. The band may then be removed from the toot-h, whereupon it will present the appearance shown in Fig. 11. From the inner side of the band the said band'may be soldered along the vedges of the.

fold and the said band connected to hthe bridge or other' dental work in the usual manner. ln finishing the work before placing same in the mouth of the patient the fold 17 may 'be cut away and polished down in a very convenient and satisfactory manner.

I claim:

l. A dentists pliers for contracting and fitting an endless band around a tooth, comprising a pair of pivoted handles having laterally extending backwardly curved jaws, the extremities of the jaws having approximately elliptically-shaped outer thin band engaging portions adapted to operate on an endless band as described.

2. A dentists pliers for contracting an endless band around a tooth, comprising a pair of pivoted handles having laterally extending backwardly curved jaws, the extremities of the jaws having approximately elliptically shaped outer thin hand engaging portions with roughened inner surfaces adapted to operate on an endless band as described.

VIn testimony that l claim the above, I have hereunto subscribed my name iu the presence of two witnesses.

FRANK F. DUUDS.

Witnesses:

JOHN H. BISHOP, WILLIAM H. MILLER. 

